how to diagnose a Ford Explorer Sixth Generation (2020-present) that won’t shift gears

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

505 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix transmission shifting issues in Ford Explorer (2020-present). Step-by-step guide with symptoms and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the transmission to cool before inspecting fluid levels.

Symptoms

•Check engine light illuminated
•Transmission slipping or hesitation during gear changes
•Unresponsive gear selector
•Unusual noises from the transmission area
•Fluid leaks under the vehicle
•Poor acceleration

Diagnostic Steps

1
Use an OBD-II scanner to check for any stored error codes related to the transmission.
2
Inspect the transmission fluid level and condition, ensuring it is within the proper range and not burnt.
3
Examine the gear selector linkage and components for any signs of damage or misalignment.
4
Check the battery voltage and charging system, ensuring that the battery is in good condition and fully charged.
5
Inspect wiring and connectors in the transmission control module (TCM) for corrosion or loose connections.
6
Perform a road test to monitor shifting patterns and any related symptoms.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Torque wrench
•Electric contact cleaner
•Transmission fluid dipstick

Parts Required

•Transmission fluid (Ford Mercon ULV)
•Gear selector assembly (if damaged)
•Faulty sensors or solenoids (if identified)

Related Faults

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Diagnostic Steps

1
Use an OBD-II scanner to check for any stored error codes related to the transmission.
2
Inspect the transmission fluid level and condition, ensuring it is within the proper range and not burnt.
3
Examine the gear selector linkage and components for any signs of damage or misalignment.
4
Check the battery voltage and charging system, ensuring that the battery is in good condition and fully charged.
5
Inspect wiring and connectors in the transmission control module (TCM) for corrosion or loose connections.
6
Perform a road test to monitor shifting patterns and any related symptoms.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to prevent any electrical shorts during repairs.

2. Check Transmission Fluid

Remove the transmission dipstick and wipe it clean.
Reinsert and remove again to check the fluid level; add the correct transmission fluid (Ford Mercon ULV) if low.
Inspect fluid color and smell; if burnt or contaminated, consider a fluid change.

3. Inspect Gear Selector Mechanism

Locate the gear selector and inspect the linkage for wear or disconnection.
If damaged, replace the gear selector assembly, following the manufacturer’s specifications.

4. Examine Electrical Connections

Locate the TCM and visually inspect wiring harnesses for damage.
Disconnect the TCM and clean the connectors with electric contact cleaner.
Reconnect and ensure all connections are secure.

5. Replace Faulty Components

If diagnostic codes indicate a specific sensor or solenoid malfunction, replace the affected part.
Follow torque specifications when installing new components.

6. Reconnect Battery and Test

Reconnect the battery terminals.
Perform a test drive to confirm that the transmission shifts smoothly through all gears.